Memory leaks in EVT_TRANSACTION handling in nfc: st21nfca

Kernel Updated 02 Oct 2025

Summary

28/06/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002931: nfc: st21nfca: fix memory leaks in EVT_TRANSACTION handling. Affects Kernel versions >= 26fc6c7f02cb26c39c4733de3dbc3c0646fc1074, < db836b97464d44340b568e041fd24602858713f7. No fix is published. How to fix ↓

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Background

The nfc: st21nfca package is a component of the Linux Kernel, which is responsible for handling Near Field Communication (NFC) functionality. NFC allows for short-range communication between devices, enabling various applications such as contactless payments and data transfer. The st21nfca module specifically provides support for STMicroelectronics ST21NFCA NFC controllers. This vulnerability affects versions of the Linux Kernel from v4.0 to v5.17.14.

Vulnerability Detail

The vulnerability in nfc: st21nfca is related to memory leaks in the EVT_TRANSACTION handling. When processing certain NFC transactions, the module fails to release allocated memory, leading to memory leaks. An attacker could potentially exploit this vulnerability to exhaust system memory resources, resulting in a denial-of-service condition or other unpredictable behavior. The vulnerability was introduced in version v4.0 of the Linux Kernel and has been fixed in version v5.17.15.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

In conclusion, the nfc: st21nfca package in the Linux Kernel is vulnerable to memory leaks in EVT_TRANSACTION handling. This vulnerability can be mitigated by updating to Linux Kernel version v5.17.15 or later. For further support on vulnerability remediation, please contact DevNack.com.

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